Refrigerating apparatus



April 3 H. HULL 2,155,831

REFRIGERATING APPARATUS Filed Oct. 24, 1954 IN NTOR. 24W, @2

I ATTORIZYS Patented Apr. 25, 1939 REFRIGEBATING APPARATU Harry B. Hull, Dayton, Ohio, assignor to Gen eral Motors Corporation, Dayton, Ohio, a corporation of Delaware Application October 24, 1934, Serial No. 749,!31 4 Claims. (01. 62-129) This invention relates to refrigeration and more particularly to self-contained air conditioners. i

It is among the objects of this invention to .provide a room cooler or air conditioner which does not require water pipe connections and which is adapted to insure the introduction of fresh air into the room.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawing, wherein a preferred form of the present invention is clearly shown.

In the drawing: Fig. l is a vertical cross-sectional view, somewhat diagrammatic, of an apparatus embodying features of my invention; and

Fig. 2 is a vertical cross-sectional view taken along the line 22 of Fig. 1.

90 An apparatus embodying features of my invention includes, ingeneral, a cabinet i0. provided with bracket means Ii which are adapted to support heat dissipating means in the form of a condenser l2 outside of a room [3 in which the conditioner is adapted to be located. The cabinet I0 is provided with an air conditioning chamber l3 in which a heat absorber or evapo-' rator I4 is located. Means are provided for circulatingair to be conditioned in thermal ex- 30 change with the evaporator l 4, and this may take the form of a blower l5 driven by a motor i6 which causes air from the room, or outside the room, to enter through the inlet i1, flow past the evaporator l4 and be discharged in a cooled or 35 dehumidified condition through the outlet I8.

The cabinet l0 may also be provided with a compressor chamber iii in which a refrigerant translator or compressor is located. In addition, this compartment may also contain a motor 40 2! which drives the compressor through the medium of a belt 22. The compressor 20 withdraws refrigerant from the evaporator 14 through the suction line 23 and discharges the compressed refrigerant to the condenser l2 through the line 45 24. The condensed refrigerant gathers in the receiver 25 and flows from thence through the line 26 to the expansion valve 21. This expansion valve may be of the type which automatically introduces refrigerant into the evaporator so whenever the pressure therein drops below a predetermined limit, which limit preferably corresponds to a vapor pressure above 32 F. The expansion valve may be provided with a thermo static bulb 28 placed in the suction line 23 near 5 the outlet of the evaporator which tends to throttle the valve 2i wheneverthe refrigerating effect reaches the bulb, and thus prevents the introduction of liquid refrigerant into the compressor 2d.

Means are provided for circulating air from 5 outside the room It over the condenser i2. This may take the form of a blower 3|] having an air intake at 35 and which discharges air over the condenser and from thence through the outlet 32 in the bottom of casing 33. The blower 10 may be driven from a motor 3%. which, in this case, is conveniently mounted on the sill 35 of the window 36.

Means are provided for discharging air from the room It to the outside. This may take the is form of a conduit 31 which is supported on the bracket means ii and discharges through the outlet 38 into the casing 33 and from thence through the outlet 32. A blower 39 is provided for causing flow of air, and this blower conven- 2 iently may be driven from the motor 2| and causes air to enter at the inlet 40 from the room l8, flow through the chamber l9 over the compressor 20 and motor 2i, thus cooling them, and thereafter be discharged through the window 36 5 through the outlet 22.

Means are provided for discharging moisture condensed on the evaporator I 4 outside of the room. Thus a drain pan 4! is placed to receive the moisture condensed on the evaporator from 3 the air to be conditioned, and a wick 42 extends from the interior of the pan 4i into the conduit 31. The moisture in the pan 4| is thus transferred, by capillary action, to the air passing throughthe conduit. and is discharged in vapor 35 form through'the outlet 32 outside the room.

Means may be provided for controlling various parts of the apparatus. Thus a master switch 45, which may be manually controlled, governs all of the motors-in the apparatus. when this switch is closed the motor It operates and drives the fan ii. The fan l5 may thus be operated at any time, and if other switches hereafter to be described are not closed, the fan it may operate independently of the refrigerating 45 system. If refrigeration is desired, a second manually operated switch 46 may be closed and the closing of this switch placm the control of the operation of the motors 2| and 34 under the control of switch 41. The switch 41 may be made 50 responsive to atmospheric conditions, preferably of the atmosphere in the room I3. Thus a thermostatic bulb 48, which may be a drybulb, wet bulb, or combination of both, operates a bellows 49 andjopens and closes the switch 41. The bulb 66 48 conveniently can be placed near the inlet H where the air flowing thereover is a representative of the air in the room l3. When thetemperature of the bulb 48 rises to a predetermined limit the switch 41 is closed and the motors 2| and 34 together with the devices driven thereby are caused to operate in conjunction until such time as the temperature of the bulb 48 drops to a lower predetermined -iimit when the switch 41 is opened.

The bracket means H may be caused to cooperate with the sill 35 so that the same may be in substantially sealed relationship with the sash 50. A false sill 5| may be incorporated in the bracket means and this may be made adjustable to the width of the window or may be made of the exact size necessary for the window. The bracket means ll may be made adjustable on the cabinet H3, or the cabinet It may be vertically adjustable on the supports 52 ina well-known manner.

When air is forced out of the room through the conduit 31, air infiltrates into the room through various openings in the room. For example, air may enter through the passageway 53 left open by the partially lowered sash 50. However, the sash may be made shorter to accommodate the new heighth of sill, so that the same is in substantially sealing relationship with the upper sash 54. will enter the room through various openings, and is thus diifused throughout the room without causing any discomfort to the occupants.

While the form of embodiment of the invention as herein disclosed, constitutes a preferred form, it is to be understood that other forms might be adopted, all coming within the scope of the claims which follow.

What is claimed is as follows:

1. In an air conditioner for a room or the like, an evaporator and compressor in said room, a condenser outside said room, a blower to circulate air outside said room over said condenser,

In such case, the air a condenser blower motor connected to said blower, a second blower to circulate air to be conditioned over said evaporator, conduit means to circulate air from said room out of said room, a third blower for said conduit means, a compressor motor connected to said compressor and to said third blower, switch means responsive to conditions in said room for controlling the operation of said motors.

' 2. In an air. conditioner for a room or the like, an evaporator and compressor in said room, a condenser outside said room, a blower to circulate air outside said room over said condenser, a condenser blower motor connected to said blower, a second blower to circulate air to be conditioned over said evaporator, conduit means to circulate air from said room out of said room, a third blower for said conduit means, a compressor motor connected to said compressor and to said third blower.

3. In combination, a cabinet, bracket means on said cabinet adapted to extend outside a window in which said cabinet is to be placed, an air conditioning chamber in said cabinet, an evaporator in said chamber, a blower for circulating air past said evaporator, a compressor chamber in said cabinet, a compressor in said compressor chamber, a condenser supported on said bracket means, a blower circulating air from outside said room past said condenser, a blower for circulating air from said room out said window, and a common control controlling the operation of at least two of said blowers.

4. In an air conditioner for a room or the like, an evaporator and compressor located in said room, a condenser located outside said room, means to circulate air outside said room over said condenser, means including a wick to discharge condensation, and means to circulate air from said room over said compressor and thereafter over said wick and out of said room.

. HARRY B. HULL. 

